Use case or problem
Using two fingers to swipe from left to right navigates back one note and swiping from right to left navigates forward one note. …But the navigation toolbar does that too. Plus you can add those actions to the mobile toolbar.
Proposed solution
If we could customize the gestures, we’d be able to get more use out of them. Also, I’m sure many people don’t even know the gestures exist, so if they see that they’re customizable in the settings that’d basically let them know.